easy disc brake swap
:canada: i have just swapped my drum brakesover to disc brakes by using the front pieces off a 1988 chev pickup. all i had to do was replace my bottom a-arm from a 1/2 ton to a 3/4 ton a-arm. the top balljoint was the same one but the bottom one had to be changed to a 88 ball joint. it pops right into the 3/4 ton a-arm. it only cost me 140.00 to do it as well. then your steering linkage just has to be adjusted to fit. i hope this helps somebody.
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You have any pics? I am interested in how it looks.
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i dont have any pictures yet, but will soon.
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Damn thats a good idea, let us know how they perform and wear over time!!! My hats off to you!!:)
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hello JHickson6: thanks for the reply. another good thing about this swap is the parts needed for this swap are the parts from a 1988-1993 truck including ball joints which are about 1/2 the price of 1968 ball joints.
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So what you used was an 88 and up spindel? with which lower balljoint, the 88 and up half, or the older 3/4 balljoint. All this utilizing the older upper control arm using the halfton balljoint?
Definetly feel the 6 lug updated adaptation may be within reach here using the newer semi-floating 14 bolt rear.!!!!!! (light 3/4ton, - 2500 series) |
hello Chop Top: the 88 spindel, rotor, calipers, and ball joints were used in the swap. but you need a 3/4 ton 68 a-arm instead of the 1/2 ton one. the bottom 88 balljoint fits into the 68 a-arm, and the top 88 ball joint fits on the 68 a-arm. the top 88 ball joint you half to grind the rivets off of the 88 a-arm and then bolt it to the 68 a-arm. hope this clears it up. thanks!!!
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can you post some pics love to see. did toy have to change your lines or power booster just wanting to know. love to do it if i can do it for cheep. the 900.00 kits are not for me
thanks Darren |
dream 69, Welcome to the board from Maryland. This sounds very interesting!. We would love to see some pics when you can. I don't drive my truck enough to justify the $700 kits either but would go for half of that if it's as simple as you say. I'm assuming you used the 88' 4x4 brakes to retain 6 lugs?. Did you use the newer style Master Cylinder and booster? Thanks.....Jim
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I wonder if the 76 3/4 ton lower arm with do? Thats whats under mine now. I would love to try this setup. That would give me more reason to re-install the older style upper arm with new bushings. Is this going to change my track width any??
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Hello chop top,
I believe the '76 3/4 ton lower arm is exactly the same but has a higher rubber snubber on it. So in my opinion it shouldn't change the track width any. dream68 |
Dream 68, thats an interesting swap! how did the tierods work out with the 88 spindles?(or better put...which ones did you use?)
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Dream68, Welcome aboard !!!!
That's the way I tried to do it, but didn't know the 3/4 ton was different. A friend gave me 2-1/2" drop spindles off of a newer truck, I bought everything to do the switch, But it came to a stop when I found out the lower ball joints were different, No one around here knew how to get around it. I went to Tuckers in Las Vegas and bought the complete disc brake,spindle kit from them. Wish I would have known this then. would have saved me about $600.00. That's nice about a board such as this, With so many people doing this stuff we learn most of the time the easy way instead of the hard way..... |
hello 70C10: i am going to use the master cylinder and booster off a 70 1/2 ton. will work just fine.
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Drum master on Calipers?
I don't think that is going to provide you with enough fluid volume for the calipers.
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2nd that chop top......the calipers will hang also with the residual valve on the drum master......
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ok guys, which year master do you suggest?
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71-72 I think would be the best, unless someone else has found another one that will bolt on our trucks.
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dream 68, i have always been a beleiver in peel the parts off the same truck if you can. My 69 longhorn has ALL the pcs off a 75 C10(master, lines,hoses,prop valve,calipers,reardiff/brakes......yep, its a 1/2 ton ride now! I couldnt say for sure on your combo, but i dont like to mix em. Generally, the pcs that were designed together tend to work best together. Good luck.....crazyL:)
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Crazy Longhorn: sorry so late getting back. i used the steering linkage from the 68. the tie rod ends fit the 88 spindle .
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Thats cool, its sounds like it will get around all the center link/tierod issues that are involved with using the 71-72,or 73-87 pcs on the older trucks! :)
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Dream68 youve got me thinking. Chevy made 6lug 2wd 3/4ton truck 88 up, so would the balljoints and evreything still work, I am wondering if the 6lug spindle is the same as the fivelug so i wouldent have to change the rearend.:confused:
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GMC JUNKIE TOO: my 68 chev was a 6 lug before the swap , and is after the swap. all parts work as i have stated before.....
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the 6 lug is the same...
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awsome, it will be alot cheaper than $899.00 for 6 lug disc brakes evenafter the drop spindles.:D
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